class Animal:
    name = 'animal'
    def shout(self):
        print('animal shout')

animal = Animal()
print(animal.name)
animal.shout()

class Dog():
    name = 'dog'
    def __init__(self):
        self.age = 10

    def eat(self):
        self.age = 10
        print('dog eat')

dog1 = Dog()
print(dog1.name)
print(Dog.name)
print('------------------')
dog1.name='ddd1'
print(dog1.name)
print(Dog.name)
print('------------------')
Dog.name='__dog'
print(dog1.name)
print(Dog.name)
print('------------------')
dog2 = Dog()
print(dog2.name)
print(dog2.age)


print('------------------')
dog1.eat()